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Finding the Fourth Proportional to 240.37, 360.55 and 78.06

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Solution

The fourth proportional to 240.37, 360.55 and 78.06 is: 117.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.37 : 360.55 = 78.06 : x
  2. Step 2: Convert to fraction form
    240.37/360.55 = 78.06/x
  3. Step 3: Cross multiply
    240.37x = 360.55 × 78.06
  4. Step 4: Simplify right side
    240.37x = 28,145.98
  5. Step 5: Solve for x
    x = 28,145.98/240.37
  6. Step 6: Final answer
    x = 117.10

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.